Radiocoil



July 27,1926.

A. E. ZIERI'CK RADIOCOIL Filed April 13. 1925 ATTORNEYS ICE.

AMBROSE ELVIN ZIERICK, OF NEW YORK, N. Y.

RADIOGOIL.

.pplioation filed April 13, 1925 Serial No. 22,786.

This invention relates to toroidal air core coils, and a method of making the same. Heretofore a great deal of trouble has been experienced in the manufacture of toroidal 5 coils, due to the :lact that the inner periphery of the coils where the portions of the loops of the wire were crowded together disclosed a decided weakness. the strands forming the coils at this point becoming readily displaced and the function oi the de viceimpaired. Furthermore. the delicacy of the structure produced by the weaving of the Wire on supports, which precluded any degree of rigidity or reinforcement, aided materially in the gradual disintegration of the coils. The loops atthe inner periphery being laid in juxtaposition tended to provide a' larger coil for the quantity of wire required than was necessary.

It isan object of the present invention to provide a coil in such a manner that the WOVBII' strandsof wire, more particularly at the inner periphery of the core of thecoil, will be overlappec and intertwined to an extent that there will be no possibility of the wires or coil becoming disassociated.

Another object of the invention is the provision of a coil tormed of wire woven on uniformly spaced flexible strands of: nonconducting material and a reinforcing strand spaced from one of the strands so that an alternate pair of loops of the wire will be disposed upon one side of the rein; forcing strand and embraced upon opposite sides by loops of the wire, one'of the last mentioned loops passing between the reinforcing strand and its adjacent strand,

while the other loop is disposed outwardly and around the adjacent strand. I

A further object otthe invention is the provision of a method of forming toroidal coils, in which a wire is interwoven in such a manner with spaced su iiporting strands and a co-operating reinforcing strand spaced from one of the supporting strands that a cylindricalformation will be produced, with the portions of a pair of loops of the wire being located inwardly of the reinforcing strand and portions of wire continuing from the loops crossing alternately one on each side of their portions of the wire. while the loops ofthe continued portions adjacent the inwardly disposed portions are located outwardly oi the reinforcing, strand and the adjacent supporting strand.

. A. still further object of the invention is ing the provision of a toroidal coil, in which a wire is interwoven with a plurality of spaced supporting strands and a reinforcing strand spaced from one of the supporting strands, and in which the portions of the wire adjacent the inner periphery of the toroidal coil are disposed away from the periphery, with the adjacent portions of juxtapositioned loops projecting outwardly from the first mentioned loops. so that when the coil is p 1,594,292. UNITED STATES PATENT or? formed the portions ofthe loops at the inner periphery may overlap each othof and thereby permit a decrease 1n the diameter of the inner periphery} lVith the above recited and other objects.

in view, the invention resides in the novel construct-ion set forth i the Following specification, particularly pointed nut in the ap pended claims and illustrated in the accompanying drawings, it being unth'rstood that the right is reserved to embodiment-s other than those actually illustrated l1fl,'("l, to the full extent indicated by the general meaning of the terms in which the claims are expressed.

In the drawings Figure 1 is a plan View of a toroidal coil constructed according to the principles of my invention. Figure 2 is a transverse vertical section of one form of the coil.

Figure. 3 is a side view of certain portions of the loops of the wire showing the method of weaving the Wire with the supporting strands. i

Figure 4 is atransverse vertical section of the preferred form of my invention.

Figure 5 is a side view of a section ofgthc coil showingthe' method of weaving the hire with the supporting strands for producing the construction disclosed in Figure 4.

in" I the spaced supporting strands upon which the insulated Wire 6 is Woven. A reinforcing strand 7 is spaced from any one oft-he supporting strands, such as 4, a sutlicicnt distance to permit, the insertion of the loops of the Wire 6. The supporting and reinforcs'trands areheld in the usual manner in spaced relation so that the Wire may be interwoven with the strands.

Referring more particularly to Eigure 2. the method of weaving is as follows: The wire 6 is'carried downwardly around strand 4 to form a loop 8 in substantially close contact with said strand, and upwardly and inwardly of strand to form a loop 9, outwardly and around strand 1 forming a loop 10, and in wardly of strand 2 forming a loop 11, downwardly and outwardly of strand 3, as shown at 12, and between strands 4 and 7. The strand is then carried outwardly and around strand 5, as shown at 13. i nstead of inwardly, as spacedv from the loop 9 by the strand 5, so that the loops 9 and 13V thus formed embrace opposite sides of strand 5. The wire is then continued upwardly and passed inwardly of strand 1, as shown at 14, the previous loop being disposed outwardly of said. strand. The wire is then carried outwardl and around strand 2, as shown at 15, Men downwardly and 1nwardl at 16', of strand 3, then through stran s 4 and 7 in juxtaposition with the previously formed loop 17, so that two loops 17 and 18 will be provided at this point which are adapted to be crowded together when the coil is bent to form the inner peripher The continuing portion of the loop 18 extended upwardly and inwardly of strand 5, as shown at 19 and in close contact with said strand and in juxtaposition with the previously formed loop 9. The continu' extends and carried outwardly of strand 1 to provide loop 20 and in close contact with trend 1. While I have-shown the various loops or portions of the turns of wire in certain instances spaced outwardly or inwardly from the strands 1, 2, 3 and 5 for the purposes of illustration only, it must be borne in mind that the loops of all the turns are in close contact with the strands so that when the coil is complete, a section of the coil at any point will disclose a circle. The continuing portion of loop 20 of the wire is then carried inwardly of strand 2, forming a loop 21 which is also in contact with said strand. The wire is then continued outwardly and around and in engaging relation with strand 3, as shown at 22. The loop 22 is in juxtaposition with the previously formed loop 12.

The continuing portion of loop 22 of the wire is carried. downwardly around and outwardly of strand 4, as shown at 23, and adjacent loop 8, thereby contacting pith strand 5 to .provide loop 24 and then carried inwardly in engagement with strand 1, as shown'at 25. The continuing portion of loop 25 is carried outwardly and around strand 2 adjacent loop 15 to form a loop 26.

The wire 6 is then interwoven with the similarly formed loops,

beenieompleted, thereby always providing at the inner periphery of the coil a pair of loops 1? and 18 inserted through'strands 4 and 7, and a pair of loops 8 and 23 engaging around strand and embracing loops pair of loops 47 and 48 g portion of the loop 19 is then.

'8 and 23, so that when the ends of the strands, as shown at 27 and are brought together and tied to form the toroidal coil 29, the loops 8 and 23 may be crushed, as

In the preferred form shown in Figures '4 and F, the wire 40 1s interwoven with the supporting strands 41, 42, 43, 44, and a reinforcing strand 46 in a manner similar to the weaving of the strands shown in Figures 2 and 3, with the exception that a are always provided inwardly of the reinforcing strand 46, while a loop 49 is disposed between strands 4-1 and 46 and a loop is located outwardly of strand 44. It will also be noted that the continuing portions of the loops of the wire alternately cross each other and on opposite sides of the other strands 41, 42, 43 and 45, with the loops always in close contact with the respective strands.

This construction also provides fo'r'the economical crowding of the loops 49 and 5t) and 47 and 48, so that when the coil is formed by bringing the ends of the strands together, the outer loops 49 and 50 may be bent around and in embracing relation to substantially receive theinner loops 47 and 48 By reason of the crowding of the loops at the peri hery of the toroidal coil, a stronger an better coil is provided, since pairs of loops overlap and embrace other pairs of loops and a smaller diameter of the periphery of the coil is provided for the same numberof turns of wire which ha ve been previoufly employed in the manufacture of the well known forms.

The forming of the pairs of loops having a longer or Shorter diameter than alternate pairs provides for the partial reception of the loops having the smaller dian'ieter with in the loops of larger diameter and at the inner periphery of the coil, so that the outer loops iaving tie greater diameters will not only partially receive the inner loops butv may be bent. over the outer edges of the inner loops. With this construction, a more compact coil is provided, since the lessening of the inner periphery of the coil does not require the usual wide Spaces between the portions of the loops at the outer periphery of the coil and therefore does not require the usual wide spacing of the turns at the outer periphery of the toroidal coil.

Having thus described my invention, I claim:

1. A toroidal coil formed of ible supporting strands, and a wire interspaced flexl a portion of a pair of woven with the stroniis to provide loops, alternate pairs of the loops of tho wire at the inner periphery of the coil being disposed. inwardly of the other pairs of the loops so that the inner pairs of the loops will received. Within the outer pairs of the loops.

toroiciol coil formccl of spz ced flexible supporting strands, a reinforcing strand, and o wire interwoven with the strands to n'ovide loops, alternate pairs of loogos oi the Wire at, the inner periphery of the coil losing disposed inwimily of other pairs of the loops, the reinforcing strand cooperating with an adjacent supporting otmml for aiding in spacing the longer loops at the inner periphery of the coil.

I is. toroidal coil formecl of spaced flexible supporting strands, a. reinforcing Tend, woo; o WEN} ioteowoven with the to provide loops, the portions of alpoirs of the loops being disposed opposite sides of the reinforcing so that the portions of the loops of e strand, and o. Wire interwoven with the strandsto provicle spirally arranged loops, loops of the Wire bcingdisposed inwardly of the reinforcing strand while the qniirof loops located be tween the alternate pairs of loops are clisposed outwardly of the reinforcing strand, one of the loops of the intermediate pair of loops being disposed between the reinforcing strand and on adjacent supporting location inwardly of the strand ore strand, the other loop being located out- Wardly of the supporting strand.

6.1K toroidal coil formed of spaced flexible supporting strands, and a wire i11- terwovon with the strands to provide 5 irelly arranged loops, alternate pairsof t o loops 'being ot' less diameter than the other pairs of loops.

7, A toroidal coil formed of I spaced flexible supporting strands, and a wire interwoven with the strands sully arrange-1i loops, alternate pairs of the. loop being of less diameter than. the other pairs 0;; loops, one loop' or each alternate pair of loops beingof less diameter than the adjacent loop of said pair.

8. A method of forming toroidal coils which com rises 11 ml in a conductin wire P n y g to supporting strands spaced about o longitudinal axis and a reinforcing strand spaced from one of the supporting strands, weaving the wire consecutively above anti below alternate strands and placing at the same time a pair of loops of thewire a'bove the reinforcing and alternate pairs of loops below said strand.

9. A toroidal coil formed of flexible strands and a plurality 0 wire interwoven with the stran s inforcing strand interwoven with and (to-operating to place ortions nuts pairs of the turns 0 spaced turns of a and s. rothe turns the wire at the nner periphery of the coil Within the ad gaeent pairs.

10. A toroidal coil formed of spaced flexible supporting strands, a. reinforcing strand, :1 wire interwoven with the strands to provide spirally arranged loops, a portion of a series of loops of the Wire bein disposed inwardly of the reinforcing strano while the series of loops located between the alternate Wardly of the reinforcing stran 11. A toroidal coil formed of spaced flexible supporting strands, and a wile interwoven with'the strands to provide spirally arranged loops, alternate series of the loops being of less diameterthsn the other series of loops.

AMBROSE ELVI N ZIERICK.

to provide splof alter-.

series of loops are disposed out- 

